builtins.c: strengthen various rtx to rtx_insn * and other subclasses

builtins.c: strengthen various rtx to rtx_insn * and other subclasses

gcc/
2014-08-21  David Malcolm  <dmalcolm@redhat.com>

	* builtins.c (expand_builtin_longjmp): Strengthen locals "insn"
	and "last" from rtx to rtx_insn *.
	(expand_builtin_nonlocal_goto): Likewise for local "insn".
	(expand_builtin_apply): Strengthen local "call_insn" from rtx to
	rtx_call_insn *.
	(expand_errno_check): Strengthen local "lab" from rtx to
	rtx_code_label *.
	(expand_builtin_mathfn): Strengthen local "insns" from rtx to
	rtx_insn *.
	(expand_builtin_mathfn_2): Likewise.
	(expand_builtin_mathfn_ternary): Likewise.
	(expand_builtin_mathfn_3): Likewise.
	(expand_builtin_interclass_mathfn): Likewise for local "last".
	(expand_builtin_int_roundingfn): Likewise for local "insns".
	(expand_builtin_int_roundingfn_2): Likewise.
	(expand_builtin_strlen): Likewise for local "before_strlen".
	(expand_builtin_strncmp): Likewise for local "seq".
	(expand_builtin_signbit): Likewise for local "last".
	(expand_builtin_atomic_compare_exchange): Strengthen local "label"
	from rtx to rtx_code_label *.
	(expand_stack_restore):  Strengthen local "prev" from rtx to
	rtx_insn *.

From-SVN: r214288